如何使用PowerShell在特定日期前/後安裝修復程序？Get-HotFix|Where-Object-FilterScript{$_.InstalledOn-lt([DateTime]'01/01/2015')}# Before 01/01/2015Get-HotFix|Where-Object-FilterScript{$_.InstalledOn-gt([DateTime]'01/01/2015')}# After 01/01/2015